Subtract 18/70 from 3/49
3/49 - 18/70 is -48/245.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
3/49 = 3 × 10/49 × 10 = 30/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
18/70 = 18 × 7/70 × 7 = 126/490 - Subtract the two like fractions:
30/490 - 126/490 = 30 - 126/490 = -96/490 - After reducing the fraction, the answer is -48/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/49-18/70 3/49-36/70 3/98-18/70 9/49-18/70 3/49-54/70 15/49-18/70 3/49-90/70 21/49-18/70